Weather Alert in Ohio
Severe Thunderstorm Watch issued April 29 at 12:32PM EDT until April 29 at 7:00PM EDT by NWS Cleveland OH
AREAS AFFECTED: Ashland, OH; Holmes, OH; Knox, OH; Mahoning, OH; Marion, OH; Morrow, OH; Richland, OH; Stark, OH; Wayne, OH
DESCRIPTION: THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 188 IN EFFECT UNTIL 7 PM EDT THIS EVENING FOR THE FOLLOWING AREAS IN OHIO THIS WATCH INCLUDES 9 COUNTIES IN NORTH CENTRAL OHIO ASHLAND KNOX MARION MORROW RICHLAND IN NORTHEAST OHIO HOLMES MAHONING STARK WAYNE THIS INCLUDES THE CITIES OF ALLIANCE, ASHLAND, AUSTINTOWN, BOARDMAN, CANTON, CARDINGTON, KILLBUCK, MANSFIELD, MARION, MASSILLON, MILLERSBURG, MOUNT GILEAD, MOUNT VERNON, ORRVILLE, RITTMAN, WOOSTER, AND YOUNGSTOWN.
INSTRUCTION: N/A
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Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
Weather Topic: What is Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
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